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BATMAN - "The Joker Goes to School" - Airdate March 2, 1966. (Photo by Walt Disney Television via Getty Images Photo Archives/Walt Disney Television via Getty Images) CESAR ROMERO

BATMAN - "The Joker Goes to School" - Airdate March 2, 1966. (Photo by Walt Disney Television via Getty Images Photo Archives/Walt Disney Television via Getty Images) CESAR ROMERO

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BATMAN - "Surf's Up! Joker's Under!" - Airdate November 16, 1967. (Photo by Walt Disney Television via Getty Images Photo Archives/Walt Disney Television via Getty Images) CESAR ROMERO

BATMAN - "Surf's Up! Joker's Under!" - Airdate November 16, 1967. (Photo by Walt Disney Television via Getty Images Photo Archives/Walt Disney Television via Getty Images) CESAR ROMERO

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BEVERLY HILLS, UNITED STATES: US actor Jack Nicholson addresses the audience after receiving the American Film Institute Life Achievement award 03 March 1995 at the Beverly Hotel in Beverly Hills. The poster behind him, pictures Nicholson as The Jocker, a role he played in the movie "Batman". The event celebrated the 35-year career of the Oscar winning actor. (Photo credit should read POOL/AFP via Getty Images)

BEVERLY HILLS, UNITED STATES:  US actor Jack Nicholson addresses the audience after receiving the American Film Institute Life Achievement award 03 March 1995 at the Beverly Hotel in Beverly Hills. The poster behind him, pictures Nicholson as The Jocker, a role he played in the movie "Batman". The event celebrated the 35-year career of the Oscar winning actor. (Photo credit should read POOL/AFP via Getty Images)

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PERTH, AUSTRALIA - FEBRUARY 12: Film goers watch The Dark Knight featuring Heath Ledger during a public tribute outdoor movie night to the late actor at Burswood Park on February 12, 2011 in Perth, Australia. Australian actor Heath Ledger won a posthumous Oscar for his portrayal of the Joker in the movie The Dark Knight. Ledger died from an accidental toxic combination of prescription drugs on January 22, 2008. (Photo by Paul Kane/Getty Images)

PERTH, AUSTRALIA - FEBRUARY 12:  Film goers watch The Dark Knight featuring Heath Ledger during a public tribute outdoor movie night to the late actor at Burswood Park on February 12, 2011 in Perth, Australia. Australian actor Heath Ledger won a posthumous Oscar for his portrayal of the Joker in the movie The Dark Knight. Ledger died from an accidental toxic combination of prescription drugs on January 22, 2008. (Photo by Paul Kane/Getty Images)

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SAN DIEGO, CA - JULY 23: Actor Jared Leto (R) greets a cosplayer as The Joker onstage at the Warner Bros. 'Suicide Squad' Presentation during Comic-Con International 2016 at San Diego Convention Center on July 23, 2016 in San Diego, California. (Photo by Kevin Winter/Getty Images)

SAN DIEGO, CA - JULY 23:  Actor Jared Leto (R) greets a cosplayer as The Joker onstage at the Warner Bros. 'Suicide Squad' Presentation during Comic-Con International 2016 at San Diego Convention Center on July 23, 2016 in San Diego, California.  (Photo by Kevin Winter/Getty Images)